Squirt-preventer for type-casting machines.



W. NICHOLAS.

SQUIRT PREVENTER FOR TYPE CASTING MACHINES. APP LICATION FILED JULY 7.1914.

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, Patented June 5, 1917.

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w. NICHOLAS.

SQUIBT PREVENTER FOR TYPE CASTING MACHINES.

APPLICATION FILED JULY 7, 1914.

1,228,588, 1 Patented June 5, 1917.

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WILLIAM NICHOLAS, or new Yomgn. "2., AssIenon TO PREMIER MACHINECOMPANY,

A CORPORATION or DELAWARE.

SQUIBT-PREVENTER FOR TYPE-CASTING MACHINES.

Specification of Letters Patent.

Patented June 5, 1917.

Applicationfiled July 7, 1914. Serial No. 849,527.

To all whom it may concern:

Be it known that 1, WILLIAM NIonoLAs, a subject of the King of GreatBritain, residing at No. 222 West Twenty-third street, in the city ofNew York, county and State of New York, have invented certain new anduseful Improvements in Squirt-Preventers for Type-Casting Machines,fully described and represented in the following specification and theaccompanying drawings, forming a part of the same.

My invention relates to type casting apparatus and more particularlyrefers to type casting and setting machines having removable matricesoperated by automatic means, and has for an object to provide means forstopping the entire mechanism promptly upon the occurrence of what isknown as a squirt to those familiar with the art; that is to say, asmall jet of liquid metal will be forced into whatever crevice may existby reason of the matrix plate not sitting properly upon the top surfacesof the mold walls.

Heretoforemechanism for the purpose has been provided which eitherfailed to act with sufficient promptitude or has employed an undesirablemultiplicity of parts, and therefore the especial advantage of myimprovements will be found in the economy of its construction as well asthe simplicity and efficiency thereof.

In the accompanying drawings, Figure 1 is a side elevation of so much ofa type casting and setting machine as is necessary to illustrate theapplication of my preferred embodiment; Fig. 2 is a similar plan; andFig. 3 is a sectional elevation of matrix plate and centering mechanism.

Referring to the drawings: The frame 1 of the type casting machine towhich my improvement applies is in its essential features similar tothat of the machine illustrated in the joint Patent No. 964,67 7 grantedto William Ackerman and myself; and the casting mechanism thereemployed, as far as is necessary for the illustrating of my presentimprovements, is shown here, of which the matrix plate 3 is carried bythe usual hinged frame 2 overthe opening of the mold 7 over the top ofwhich the under side of the matrix plate is designed to make a tightsquirt-proof union, the plate 3 being held' in such close fittingrelationship with the type mold by means of the centering pin 10 whichby entering any one of a series of sockets 5 in the back of the plate 3properly locates the character face corresponding therewith over themold. The depth of the matrix locating sockets is predetermined withgreat particularity with a reference to the operation of the'pin 10 sothat when the pin is forced down upon the matrix plate the latter fitssnugly over the top of the mold.

It may frequently occur however that a smallparticle of type metal orother foreign matter may separate the plate from the top of the moldsufliciently to permit a small sheet of molten metal being cast in theopening thus formed which will produce an imperfect type. When thisoccurs it is desirable to stop themotor immediately so that thedefective type may be removed withoutproceeding farther with thecasting.

The centering pin lO is suitably mounted inthe matrix plate frame 2, inwhich it is adapted to slide vertically, being normally held above thematrix plate by a spring against the action ofwhich the pin is forceddownwardly into the sockets 5 of the matrix plate by action of a slidingblock 11 yieldably and slidably mounted in the end of the overhangingarm 12 which is alternately raised and lowered by action of the liftingpost 13, which is operated in this manner by suitable connectionsthrough a forked lever 13" to a cam on the driving shaft of the typecasting machine. A small pin 11*- projects from the side of the block 11and .slidably fits into a slotted recess in the bearing at the end ofsaid arm 12 to prevent the block from becoming displaced therefrom. Theblock 11 has an upwardly extending stem which goes through a bearing llconveniently attached to the interior of the lifting arm, between whichbearing and the block 11 is a compression spring adapted to hold theblock 11 in the normal position shown in Fig. 3. Therefore when thecentering pin does not go to the full limit of its downward travel asthe lifting post 13 descends, by reason of the matrix plate not restingproperly upon the mold, it, the said pin, through the action of thefulcrum lever 14 that is pivotally mounted upon the arm '12 causes thevertical rod 15, slidably upon the rock shaft 17, suitably mounted inbearings upon the frame of the machine. At the opposite end of the rockshaft 17 (Fig, 2) is the finger 18 the outer end of which is adapted toengage a pin 19 projecting laterally from the upper, end of the verticallink 20 which is adapted to .slide vertically in a suitable bearing onthe framework, and loosely pivoted to the end of a bell lever 21 alsomounted upon the frame of the machine. Hence when the shaft 17 is rockedby the action of the vertical rod 15 it in turn lifts the link 20 androcks the bell lever 21.

The bell lever 21 is normally held against the stop pin by act-ion ofthe spring 22, in such position that the arm 24; thereof is contactingthe projecting tail piece of the latch 25, which is held against thelever arm 24 by action of its coil spring 26 as shown in Fig. 2. In therelative position of the parts thus described the hooked end of thelatch 25 is in engagement with the square shoulder 29 of the slidingblock 28. The horizontal contact rod 30 is slidably mounted in brackets31 and 31" and is adapted to be moved into twopositions, one of whichforces the taper end 34 thereof into contact with the terminals 35 ofthe motor that actuates the type casting machine which, however, is notshown in the drawings. The rod 30 is held in the position of makingcontact when the shoulder 29 of the block 28 on said rod is engaged bythe hooked end of the latch 25 as described above. But when the belllever 21 impinges upon the tail of the latch 25 to oscillate that memberupon its pivotal bearing, it is thrown out of engagement with theshoulder of the block 28 on the rod 30, whereupon the compression springcoiled about the rod 30 and held between the bracket 31 and the collar33 pinned to said rod, acts to withdraw the taper end 34 from out ofelectric contact with the terminals 35, thereby breaking the circuit bywhich the motor is driven.

Thus when the matrix plate is not allowed I to seat itself closely uponthe top of the mold .member, in the manner described, it impartsconsiderable rotatable motion to the shaft 17 by reason of the greaterlength of the finger 18 over the lever 16 and also by reason of thesimilarly increased length of the actuating arm of the fulcrum lever ltin comparison with the actuating end of said lever,

whereby a slight longitudinal displacement of the centering pin 10 willcause the actuating lever arm 24 to lift the latch 25 in the mannerdescribed out of engagement with the block on the horizontal contact rod30 contact the end of the rod, and, upon being manually operated, toforce the rod 30 into contact with the terminals 84 sufliciently far topermit the latch 25 again to engage the shoulder of the block 28,thereby holding the contact taper 34 into position to complete thecircuit that drives the motor.

Having described my invention, what I claim is:

1. In a type casting and composing machine, a mold and movable matrixthereon; yielding means for locating the matrix to form a metal-tightconnection with said mold; means comprising a multiplying lever andslidable rods in connection with said lever; a spring actuated circuitmaking and breaking device normally held in position to complete orclose the circuit that drives the motor; means comprising a latch forholding said circuit making and breaking device in said closed circuitmaking position; and means connected with one of said rods for operablydisconnecting said latch from said circuit closing device.

2. In a type casting and composing machine having a mold and a movablematrix plate thereon, yielding means for centering and seating saidmatrix plate upon said mold to form a metal-tight connection betweensaid mold and plates; means for breaking the current that drives themotor of said machine when said plate has not been seated suiiicientlyclose to said mold to prevent molten metal from entering the creviceformed thereby, comprising a spring yielding con tact rod normally heldby a spring latch in position to close the motor circuit; and meanswhereby said latch is lifted to permit said rod to be withdrawn from itscontact closing position, comprising a fulcrum lever having a short armat one end and long arm at the other end; a vertically sliding rodbetween the short arm and said matrix plate, and a similar rod operablydisposed between said long arm and said latch lifting mechanism.

In testimony whereof, I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM NICHOLAS.

Witnesses:

EDITH ENNISSON, JAMEs ENNISSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

